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SWITCH STAND AND LOOK.

No. 548,222. Patented Oct. 22, 1895.

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No. 548,222. Patented Oct. 22, 1895.

NIT D STATES PATENT OFFICE.

BURTON S. ROBERTSON, OF ANAOONDA, MONTANA, ASSIGNOR OF ONE-HALF TO DAVIDC. WALKER, OF SAME PLACE.

SWITCH STAND AND LOO K.

SPECIFICATION forming part of Letters Patent No. 548,222, dated October22, 1895. Application filed August 20,18 95- Serial No. 559,941. (Nomodel.)

To all whom it may concern:

Be it known that I, BURTON S. ROBERTSON, a citizen of the United States,residing at Anaconda, in the county of DeerLodge and State of Montana,have invented a new and useful Switch Stand and Look, of which thefollowing is a specification.

My invention relates to a switch stand and lock, and has for its objectto provide a construction and arrangement of parts whereby the key formanipulating the lock to release the handle or lever by which theoperating part of the switch-stand is moved cannot be withdrawn ordisengaged from the lock except when the parts of the switch are set forthe main track or for a prescribed track.

Further objects and advantages of this invention will appear in thefollowing description, and the novel features thereof will beparticularly pointed out in the appended claims.

In the drawings, Figure l is a perspective view of a switch-standconstructed in accordance with my invention. Fig. 2 is a verticalcentral section of the same. Fig. 3 is a plan view of a stationary tablewith the upper side of the lock-casing broken away. Fig. 4 is a verticalsection of the lock mechanism on the line 4 4 of Fig. 3, showing thepositions of the parts when the bolt is shot and is in engagement withthe operating lever or handle. Fig. 5 is a similar view showing theparts in the positions which they assume when the lever or handle isreleased, the keyhole-guard, whereby the removal of the key isprevented, being extended across the keyhole.

Similar numerals of reference indicate corresponding parts in all thefigures of the drawings.

The stationary table 3 is provided with a central or main notch 9 andone or more secondary or auxiliary notches 10, with either of which maybe engaged the operating lever or handle 11, which is pivotally mountedat its upper end upon the rotary head or table 4, whereby the rotaryhead may be temporarily secured in aplurality of positions to hold theswitch-rails in operative relation with either of a plurality of tracks.

The main notch 9 for engagement by the operating lover or handle is thatin which the lever is engaged when the switch-rails are in their normalor preferred position, and hence in connection with this notch isarranged a locking device consisting of a sliding bolt 12, mounted insuitable guides in a casing 13, formed by cutting away a portion of themain or stationary table 3. This bolt is provided with anactuating-spring 14, by which it is normally held in its extendedposition, and with a shoulder 15 for engagement by a key 16 to repressthe bolt against the tension of its spring. Suitable wards 17 should beemployed to insure the use of a certain key 1nserted through the keyhole18.

Arranged in connection with the lockingbolt, which is provided with aprojection 19, is a locking-bar 20, pivoted in an opening 21,communicating with the lock-casing and provided with a terminal nose 22,projecting slightly above the plane of the upper surface of thestationary table 3. The operating lever or handle carries a trip 23, towhich it is connected by means of a link 24, said trip having a beveledface 25, adapted to engage the nose 22 of the locking-bar and depressthe same to elevate the outer end of said bar, and thus disengage itfrom the locking-bolt. Gravity or other equivalent means is employed todepress the locking-bar and hold it normally in position to engage theprojection 19 ofthe locking-bolt, whereby when said locking-bolt isrepressed by the operation of the key said locking-bar falls in front ofthe projection 19 and prevents the bolt from returning to its lockedposition. When the rotary head is turned to bring the operating 1ever orhandle opposite the notch, in connec tion with which the lockingmechanism is ICO employed, and said lever or handle is repressed intothe notch, the trip 23 engages the nose or arm 22 of the locking-bar andelevates the lock at its free outer end sufficiently to remove it fromcontact with the projection 19, whereby the locking-bolt is released,and is actuated by a spring to engage a socket 26 in the side of theoperating-lever.

It will be understood that the rotary table or head 4 is spaced at itslower edge a sufficient' distance from the plane of the upper surface ofthe stationary table to allow the trip 23, after the depression of thecontiguous end or nose 22 of the locking-bar 20, to move laterally withthe rotary head without engaging the edge of the cavity 21 in thestationary table, such an interval being clearly illustrated in Fig. 2of the drawings.

The operating-lever is pivoted at an interval from its upper extremityto form an arm 27, carrying a staple 28, said arm being arranged to movefrom its vertical to its horizontal position in a casing 29, forming apart of the rotary head 4, and this casing is provided at its front orouter side with a lip or wall 30, having an opening 31 through which thestaple 28 projects when the operating-lever is in its vertical positionor is in engagement with the notch in the stationary table. A padlockmay be engaged with this staple to hold the operating-lever inengagement with the notch when, by reason of accidents or otherwise, thelocking mechanism, as above described, is inoperative.

Arranged to operate contiguous to the outer wall of the lock-casing, andhence contiguous to the keyhole formed therein, is a keyhole guard 32,carried by the locking-bolt and adapted, when the locking-bolt isrepressed against the tension of its actuating-spring, as when releasingthe operating lever or handle,

. to extend across the keyhole and thereby prevent the removal of thekey. Hence, when, after inserting the key and forcing the locking-boltback to release the operating lever or handle, the locking-bolt is heldin its retracted position by the engagement with its projection 19 ofthe locking-bar, it will be seen that the guard is extended across thekeyhole and in the path of the key, whereby the removal of the key fromthe lock, except when the bolt is in its shot or locking position, isprevented.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the spirit orsacrificing any of the advantages of this invention.

Having described my invention, what I claim is-- l. The combination witha switch-stand having a stationary table, a target-rod, a rotary headfixed to the target-rod and operating contiguous to the plane of thestationary 1 table, and an operating lever or handle pivotally connectedto the rotaryhead and adapting the withdrawal of a key from the lockwhen the bolt is retracted, and a trip operatively connected with theoperating lever to actuate said locking bar and disengaging it from thelocking bolt when the lever is arranged in the notch, substantially asspecified.

2. The combination with a switch-stand having a stationary table, arotary head arranged to operate contiguous to the plane thereof, and anoperating lever or handle pivotally connected to the rotary head andadapted to engage a notch in the periphery of the stationary table, oflocking mechanism ineluding a spring-actuated locking bolt for engagingthe operating lever when arranged in said notch, a key-hole guardcarried by said bolt to extend across the key-hole in the path of a keyto prevent the Withdrawal thereof when the locking bolt is in itsretracted position, and a trip connected to the operating lever andadapted to engage a nose or arm of the locking bar to disengage thelatter from the locking bolt when the operating lever is seated in thenotch, substantially as specified.

3. The combination with a switch-stand having a stationary table, arotary head, and an operating lever pivoted to the rotary head andadapted to engage a notch in the periphery of the table, of lockingmechanism for securing the operating lever in the notch, the sameincluding a spring-actuated locking bolt, a key-hole guard carried bythe bolt to extend across the key-hole and prevent the removal of a keywhen the bolt is retracted, a pivotal locking bar adaptedto engage aprojection on the locking bolt to hold it in its retracted position,said locking bar having a nose or arm which projects above the plane ofthe upper surface of the table, a slidable trip mounted in the rotaryhead and having a beveled face to engage said nose or arm of the lockingbar to disengage the same from the locking bolt, and a link connectingthe trip to the operating lever and adapted to communicate motion fromthe latter to the former to cause the operation of the locking bar andthe release of the bolt when the op erating lever is engaged with thenotch, substantially as specified.

4:. The combination with a switch-stand having a stationary table, of arotary head fixed to a target-rod and mounted upon the upper surface ofthe table, an operating lever pivoted to the rotary head and adapted toengage a notch in the table, said lever being extended beyond its pivotto form an arm operating in a casing carried by the rotary head,

a web or ear carried by the rotary head in In testimony that I claim theforegoing as the path of the said arm of the lever and promy own I havehereto aflixed my signature in vided with an opening to receive a staplecarthe presence of two witnesses.

ried by the arm, and locking mechanism ar- BURTON S. ROBERTSON. I rangedupon the table to engage the lever Witnesses: when in engagement withthe notch, substan- DAVID M. EVANS,

tially as specified. WILBUR P. GRIFFITH.

